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1. In Exercise 9.84, a small-scale preliminary survey has indicated that no more than 20% of the televi- sion households will tune in to the first episode of the miniseries. Given this information, how large must the sample be?
2. In a survey of 500 U.S. adults, 45% of them said that lounging at the beach was their "dream vacation." Assuming this to be a simple random sample of U.S. adults, construct and interpret the 95% and 99% confi- dence intervals for the proportion of U.S. adults who con- sider lounging at the beach to be their dream vacation.
3. For the following simple random sample of house- hold incomes (thousands of dollars) from a large county, construct and interpret the 90% and 95% confidence intervals for the population mean. The data are also in file XR09087.
58.3 50.0 58.1 33.5 51.1 38.1 42.3 60.4 55.8 46.2
40.4
52.5
51.3
47.5
48.5
59.3
40.9
37.1
39.1
43.6
55.3
42.3
48.2
42.8
61.1
34.7
35.5
52.9
44.7
51.5
A sample of 3 is taken from a population of 12 engines. what is the probability that out of 3 taken, at least one is english standard engine?
We then lead the 10 from the dummy, and our right-hand opponent plays the six (after playing the three on the first round). Should we finesse or play for the drop?
computer response time is an important application of the gamma and exponential distributions. suppose that a study of
If the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be to reject 0 H?
The researchers found that subjects who answered immediately made the best decisions and that "the longer our participants thought about their answers, the more likely they were to include irrelevant information at the expense of relevant informat..
consider the following statement each culture has its own norms of etiquette. in a diverse society like america as well
consider the experiment of selecting a playing card from a deck of 52 playing cards. each card corresponds to a sample
Discuss the utility of the graphic method of presenting statistical data. What points should be taken into account in the construction of graphs? Prepare more than ogive curve with imaginary figures.
Suppose we have the following information from a simple regression: What is the coefficient of determination? What is the correlation coefficient?
1. You are the principal of a large urban high school and wish to do a parent survey to determine how parents feel about same-sex classes. Your budget does not allow you to send out surveys to all parents. You are considering one of two procedures..
The counts in the five groups are 113, 95, 108, 99, and 85, respectively. The probabilities for these five intervals are all the same. What is this probability?
using the definitions from problem 6 define the following terms and how they relate to each othera. total variationb.
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